& (1) & (2) & (3) & (4) & (5) \\ \midrule
\textbf{Placebo year = 1969} & \multicolumn{1}{c}{Participate index}   &  \multicolumn{1}{c}{Dem quality index}  &  \multicolumn{1}{c}{Dem support index} &  \multicolumn{1}{c}{Checks on pres index}  &  \multicolumn{1}{c}{Dem inst index} \\  \midrule
Post $\times$ Intensity&   -0.008         &    0.023         &   -0.013         &   -0.066         &    0.037         \\
                &  (0.106)         &  (0.087)         &  (0.062)         &  (0.071)         &  (0.071)         \\
Post $\times$ Intensity$\times$HE&    0.046         &    0.070         &   -0.013         &    0.043         &   -0.069         \\
                &  (0.174)         &  (0.132)         &  (0.092)         &  (0.111)         &  (0.106)         \\
\midrule
Observations    &     3045         &     3028         &     3041         &     3019         &     3040         \\
DV Mean         &    1.358         &    0.886         &    1.204         &    1.205         &    1.207         \\

\midrule \\ \textbf{Placebo year = 1974} &  \multicolumn{1}{c}{Participate index}   &  \multicolumn{1}{c}{Dem quality index}  &  \multicolumn{1}{c}{Dem support index} &  \multicolumn{1}{c}{Checks on pres index}  &  \multicolumn{1}{c}{Dem inst index} \\  \midrule
Post $\times$ Intensity&   -0.018         &    0.098         &    0.046         &   -0.025         &    0.119         \\
                &  (0.086)         &  (0.066)         &  (0.057)         &  (0.068)         &  (0.075)         \\
Post $\times$ Intensity$\times$HE&   -0.169         &   -0.090         &   -0.092         &    0.006         &   -0.183\sym{*}  \\
                &  (0.159)         &  (0.108)         &  (0.083)         &  (0.098)         &  (0.101)         \\
\midrule
Observations    &     3466         &     3449         &     3461         &     3439         &     3460         \\
DV Mean         &    1.306         &    0.885         &    1.192         &    1.194         &    1.194         \\
